accent.el enable a visual popup for using accented characters in Emacs.

Is recommended to bind a global keybinding to use when typing such
as `C-x C-a`; add the following to your configuration:

(global-set-key (kbd "C-x C-a") 'accent-menu)

See README.md for more information.
https://github.com/elias94/accent/blob/main/README.md